GB1450108A - Method of injection moulding hollow preforms - Google Patents
Method of injection moulding hollow preformsInfo
- Publication number
- GB1450108A GB1450108A GB5772273A GB5772273A GB1450108A GB 1450108 A GB1450108 A GB 1450108A GB 5772273 A GB5772273 A GB 5772273A GB 5772273 A GB5772273 A GB 5772273A GB 1450108 A GB1450108 A GB 1450108A
- Authority
- GB
- United Kingdom
- Prior art keywords
- injection
- mandrel
- tube
- tip
- preform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
1450108 Injection-blow moulding UNILEVER Ltd 13 Dec 1973 [14 Dec 1972] 57722/73 Heading B5A A hollow thermoplastic preform to be blowmoulded is formed by injection moulding in a mould having a core formed by a mandrel having a blowing channel communicating with the outside surface of the mandrel wherein a pressure drop from the outside to the inside of the preform is established before release of the injection pressure, e.g. by applying a vacuum via the blowing channel. The pressure drop may be maintained from the commencement of injection or before preferably until the preform has completely set. As shown, the mandrel comprises a sleeve 5 and a relatively movable tip 6, part 6a of which is mounted on blowing tube 11. When the tip 6 is raised, groove 15 between tip 6 and sleeve 5 communicates with tube 11 via radial passages 13. The mandrel also includes a tube 21 forming passages 22a, b for coolant. The two-part injection-mould 3, 4 may also contain coolant passages. The tube 11 is communicable with a vacuum source 16 operated by control means 19 in the tip-closed, injection position. The mandrel is preferably mounted on a turret for rotation to the blowmoulding position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2261174A DE2261174A1 (en) | 1972-12-14 | 1972-12-14 | METHOD AND DEVICE FOR MANUFACTURING PRE-FORMS FROM THERMOPLASTICS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1450108A true GB1450108A (en) | 1976-09-22 |
Family
ID=5864392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5772273A Expired GB1450108A (en) | 1972-12-14 | 1973-12-13 | Method of injection moulding hollow preforms |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS501160A (en) |
| CA (1) | CA1021915A (en) |
| CS (1) | CS178905B2 (en) |
| DD (1) | DD108932A5 (en) |
| DE (1) | DE2261174A1 (en) |
| FR (1) | FR2210499B1 (en) |
| GB (1) | GB1450108A (en) |
| IT (1) | IT999977B (en) |
| SU (1) | SU520888A3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3930388A1 (en) * | 1989-09-12 | 1991-03-21 | Metzeler Gmbh | Moulding rubber undercut bellows shapes - by injection moulding preform without undercuts, placing this plus its core tool in final mould, extending core, inflating preform |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1430090A (en) * | 1964-02-03 | 1966-03-04 | Improvements in methods and devices for manufacturing hollow objects, by blowing a plastic preform |
-
1972
- 1972-12-14 DE DE2261174A patent/DE2261174A1/en active Pending
-
1973
- 1973-12-10 DD DD175234A patent/DD108932A5/xx unknown
- 1973-12-12 IT IT70671/73A patent/IT999977B/en active
- 1973-12-13 FR FR7344662A patent/FR2210499B1/fr not_active Expired
- 1973-12-13 JP JP48139525A patent/JPS501160A/ja active Pending
- 1973-12-13 SU SU1979976A patent/SU520888A3/en active
- 1973-12-13 CA CA188,159A patent/CA1021915A/en not_active Expired
- 1973-12-13 GB GB5772273A patent/GB1450108A/en not_active Expired
- 1973-12-14 CS CS7300008695A patent/CS178905B2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT999977B (en) | 1976-03-10 |
| JPS501160A (en) | 1975-01-08 |
| CA1021915A (en) | 1977-12-06 |
| DE2261174A1 (en) | 1974-06-27 |
| SU520888A3 (en) | 1976-07-05 |
| FR2210499A1 (en) | 1974-07-12 |
| CS178905B2 (en) | 1977-10-31 |
| DD108932A5 (en) | 1974-10-12 |
| FR2210499B1 (en) | 1976-10-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |